Harris Custom
Century Special 13-30 9-speed Cassette

Details

13 - 14 - 15 - 17 - 19 - 21 - 24 - 27 - 30t

305 grams.

This is a Harris Cyclery exclusive, designed by Sheldon Brown, based on a Shimano CS-6500 Ultegra cassette.

This is intended to provide nice low gears and still preserve reasonably close spacing in the cruising range, without wasting gears by devoting space to ludicrously high gears. This is intended to be a good match for bikes with traditional "full sized" chainrings.

It is generally good practice to replace the chain when you replace the cassette.